Hiroshi Tsuji Masato Terada Yuki Kadowaki Masaaki Tanizaki Shigeru Shimada Spatial Information Sharing for Mobile Phones. 331-342 2001 conf/digitalCities/2001 Digital Cities http://link.springer.de/link/service/series/0558/bibs/2362/23620331.htm db/conf/digitalCities/digitalCities2001.html#TsujiTKTS01